Supporting fibers, parenchyma cells, sieve-tube elements, and adjacent companion cells are components of:
Answers
The supporting fibers, parenchyma cells, sieve-tube elements, and adjacent companion cells are the components of the phloem.
Phloem is a complex permanent tissue in higher plants that conducts dissolved food materials, primarily sugars and organic nutrients, from the leaves to other parts of the plant. This tissue is produced by meristematic tissues located at the growing tips of roots, stems, and leaves, where new cells and tissues are produced. The phloem is composed of four types of cells: sieve-tube elements, companion cells, phloem parenchyma, and phloem fibers.
Parenchyma Cells: The parenchyma cells, which are associated with phloem vessels, aid in the storage and transport of food materials in plants. The stored food is mainly in the form of starch.
Sieve-Tube Elements: Sieve-tube elements are responsible for the transport of carbohydrates. Sieve-tube elements have no nucleus, but they are made up of a tube-like structure that has a perforated end wall, which facilitates the movement of materials between cells.
Companion Cells: Companion cells are produced from the same parent cell as sieve-tube cells and are found next to them. They provide metabolic support to sieve-tube elements and are responsible for keeping the sieve-tube elements alive. These cells are metabolically active and regulate the flow of nutrients to sieve-tube cells.
Supported Fibers: The supporting fibers, also known as sclerenchyma cells, are the most frequent cells associated with phloem in plants. These cells are essential for the structural support of the plant, as they give it a stiff and woody appearance. They have thick lignified cell walls that enable them to withstand both compressive and tensile stresses. The phloem plays an important role in the proper functioning of the plant. The transportation of nutrients is carried out by the phloem. It also helps in the exchange of nutrients between different parts of the plant.
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Related Questions
Which wound usually involves ears, fingers, and hands, and results in tearing or pulling off of a flap of skin
Answers
Answer:
Avulsion.
Explanation:
Human bite wounds are blunt wounds, sometimes with partial or total avulsion (ear, lips, nose, hands) and with intense contamination. An avulsion is a complete tear of the skin and subcutaneous tissue. It does not allow the approximation of edges. It presents moderate to abundant hemorrhage and is accompanied by the exposure of underlying tissues (bone, tendon). The tear can be complete or partial; in the latter case, a connection or bridge is preserved between the torn tissue and the rest of the body.
Which stars have the shortest lifespans?
Answers
Answer:
6 months
Explanation:
complementary DNA? please help
Answers
Answer: From top to bottom- T, C, G, A, T, A, T
Explanation:
These are the nitrogenous bases that make up a part of nucleotides in DNA.
There are 4 bases in DNA:
- Adenine
- Guanine
- Thymine
- Cytosine
The bases pair together from A to T and G to C, the way I remember is just reading it as AT GC and it works for me, but you make want to make an acronym if it helps you remember better.
As a result, all you have to do is type in the corresponding base to form the correct base pairs.
Explain how better irrigation systems can conserve two important resources
Pls help ASAP!!
Answers
Answer:
Better Irrigation can help preserve both energy and water, given the fact that if irrigation precision with respect to the amount of water a plant needs, is timed perfectly each day, as well as unutilizing uneeded areas of irrigation, can help save a tremendous amount of both water and energy. With both power and water usage per plant being on the T, this not only perfects the way of cultivating plants, but also makes it as enviromentally friendly and cost-efficient as possible.
Body Temperature is maintained at through what type of energy?
Answers
Answer:
In the process of ATP production by cells throughout the body, approximately 60 percent of the energy produced is in the form of heat used to maintain body temperature.
Explanation: hope that helps
⦁ The interaction between worms and lima beans is called?
⦁ Why is the interdependence of the worms and plants a good example of commensalism? PLEASE HELP ME!!!!!
Answers
2. In commensalism, one organism benefits, and the other neither benefits nor is harmed. In this case, plants benefited and worms seemed neither to benefit nor be harmed
Source:
Brainly
Answer:
In commensalism, one organism benefits, and the other neither benefits nor is harmed. In this case, plants benefited, and worms seemed neither to benefit nor be harmed.
include the following options
the definition of commensalism
the benefits to the plants from the worms
the lack of observed harm to the worms
the lack of observed benefit to the worms
Explanation:
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in a population, the number of new individuals produced per individual in a defined time period is called the
Answers
In a population, the number of new individuals produced per individual in a defined time period is called the birth rate.
The birth rate is the ratio among the wide variety of stay-born births in the 12 months and the average general populace of that year.
For the closing 70 years, fertility rates have decreased worldwide, with a complete 50% decline. Reasons include ladies's empowerment in training and the group of workers, lower infant mortality and the accelerated cost of raising kids.
The social structure, spiritual ideals, financial prosperity and urbanisation within U. S . are probable to affect start fees in addition to abortion fees, advanced international locations tend to have a lower fertility fee due to lifestyle picks related to financial affluence wherein mortality rate are low.
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List six different enzymes associated with the replication process.
Select six that apply.
DNA polymerase III
Nuclease
RNase
DNA polymerase I
Gyrase
DNA polymerase IV
Primase
DNA helicase
Transposase
Ligase
DNA polymerase III
DNA polymerase I
gyrase
primase
DNA helicase
ligase
Answers
The different enzymes associated with the replication process are:
DNA polymerase III
DNA polymerase I
gyrase
primase
DNA helicase
ligase
DNA replication demands a high degree of accuracy because even a minute mistake would result in mutations. Thus, replication cannot initiate randomly at any point in DNA.
For the replication to begin there is a particular region called the origin of replication. This is the point where the replication originates. Replication begins with the spotting of this origin followed by the unwinding of the two DNA strands.
Unzipping of DNA strands in their entire length is not feasible due to high energy input. Hence, first, a replication fork is created catalyzed by the helicase enzyme, which unzips the DNA strand.
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Which of the following represents a frameshift mutation? A, B, C, or D?
Answers
A frameshift mutation is a type of genetic mutation that occurs when a nucleotide is either inserted or deleted from a DNA sequence, leading to a shift in the reading frame of the genetic code.
Frameshift mutations are significant because they alter the reading frame, causing the sequence of codons to be read differently during the process of transcription and translation. This can result in the production of completely different amino acids, leading to the formation of nonfunctional or altered proteins. In some cases, frameshift mutations can lead to premature stop codons, which can terminate protein synthesis prematurely.
Frameshift mutations can have various consequences, ranging from minimal to severe, depending on the specific location and impact on the resulting protein. These mutations can be responsible for a variety of genetic disorders and diseases, such as cystic fibrosis and some forms of cancer.
In summary, frameshift mutations involve the insertion or deletion of nucleotides in a DNA sequence, which can lead to significant changes in the resulting protein and potentially cause various genetic disorders or diseases.
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If a cell that has six chromosomes goes through mitosis, how many chromosomes will the daughter cells have?
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A population of grey reef sharks in a coral reef has a maximum per capita growth rate of 1.5 er year. The population size is limited by the carrying capacity of the reef, which is 50 ndividuals.
Which of the following is the growth rate (logistic growth) of the shark population when the population is made of up 30 individuals?
a) 18
b)45
c) 48
d) 75
Answers
The growth rate of the shark population when it consists of 30 individuals is 0.9, which is equivalent to 18 individuals per year. Hence, the correct answer is option a) 18.
Logistic growth is a population growth model that takes into account the carrying capacity of the environment, which is the maximum population size that the environment can sustain. In logistic growth, the growth rate of the population decreases as it approaches the carrying capacity.
To calculate the growth rate of the shark population when it is composed of 30 individuals, we need to determine the proportion of the carrying capacity that the population represents. The proportion is calculated by dividing the current population size (30) by the carrying capacity (50), which gives us 0.6.
Next, we multiply the proportion by the maximum per capita growth rate of 1.5 per year. The calculation is as follows: 0.6 * 1.5 = 0.9.
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which of the following brain regions is most likely to directly regulate the endocrine systems?
Answers
The hypothalamus is the brain region that is most likely to directly regulate the endocrine systems.
The hypothalamus is a small but highly important part of the brain located at the base of the brain and plays a critical role in regulating various physiological processes, including hunger, thirst, body temperature, and sleep.
One of its main functions is to control the release of hormones by the pituitary gland, which is often referred to as the "master gland" of the endocrine system.
The hypothalamus produces various releasing hormones that stimulate the pituitary gland to release hormones such as growth hormone, thyroid-stimulating hormone, and adrenocorticotropic hormone, which then regulate the activity of other endocrine glands throughout the body, including the thyroid gland, adrenal gland, and gonads.
The hypothalamus also plays a key role in regulating the stress response through its connection to the adrenal gland.
Overall, the hypothalamus is a critical brain region for regulating the endocrine system and maintaining homeostasis in the body.
Its connection to the pituitary gland allows it to directly control the release of hormones that are essential for various physiological processes, making it a crucial component of the endocrine system.
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Beta1 receptor stimulation includes all of the following effects EXCEPT: a) Increase in contractility b) Bronchodilation c) Tachycardia d) Increase in conduction velocity in the atrioventricular node
Answers
Beta1 receptor stimulation includes all of the following effects except Bronchodilation (Option B).
What are Beta1 receptors?Beta1 receptors are a type of adrenergic receptor that is located primarily in the heart. These receptors are activated by the hormones epinephrine and norepinephrine, which are released by the sympathetic nervous system during times of stress or physical activity.
When beta1 receptors are stimulated, they produce several effects, including:
An increase in heart rate (tachycardia)An increase in the force of contraction of the heart muscle (positive inotropy)An increase in the speed of conduction of electrical impulses through the heart (positive chronotropy)Bronchodilation is the widening of the airways in the lungs. This is accomplished by relaxing the smooth muscle that surrounds the airways. Bronchodilation is important because it allows air to flow more freely into and out of the lungs, making it easier to breathe.
Bronchodilation is primarily controlled by beta2 receptors, which are found in the smooth muscle cells that surround the airways. When beta2 receptors are stimulated, they cause the smooth muscle cells to relax, which widens the airways and allows air to flow more freely.
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Beta1 receptor stimulation includes all of the following effects EXCEPT Bronchodilation.
Option b is correct.
Beta1 receptors are a type of adrenergic receptor that can be found in the heart, kidneys, and other organs. Stimulation of these receptors by norepinephrine or epinephrine can result in various physiological effects.
The effects of beta1 receptor stimulation include:
a) Increase in contractility: When beta1 receptors are stimulated, the heart's contractility increases, resulting in a more forceful contraction and a higher cardiac output.
b) Tachycardia: Stimulation of beta1 receptors in the heart causes an increase in heart rate.
c) Increase in conduction velocity in the atrioventricular node: The atrioventricular node is responsible for conducting electrical signals between the atria and ventricles. Beta1 receptor stimulation can cause an increase in the speed of these signals, resulting in a faster heart rate.
However, Beta1 receptor stimulation does NOT result in Bronchodilation. This is because beta1 receptors are not present in the lungs; instead, beta2 receptors are responsible for bronchodilation. Stimulation of beta2 receptors causes the smooth muscles of the airways to relax, resulting in increased airflow to the lungs.
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which of the following is the large bone found inside the hoof?
A. navicular bone
B. short pastern bone
C. long pastern bone
D. coffin bone
Answers
Answer:
D: Coffin Bone
Explanation:
Which of the following observations best demonstrate water special property of cohesion
Answers
Answer:
You forgot to put down the "Following observations"
Explanation:
Your question can not be answered
explain pesticides resistance. how does it accur? why is it a concern?
Answers
Answer:
Pesticide resistance at a population level, as opposed to just a few individual pests within a species, can occur after repeated exposure to a single type of pesticide. ... When a resistant population occurs, the pesticide is no longer useful for managing that specific pest and other management options must be sought out.
How many times does interphase occur before meiosis?
Answers
To______
means to allow another
road user to cross or use an intersection or
roadway before you do.
Answers
Answer: Yield
Explanation: Yielding is an important traffic rule that promotes safety and smooth flow of traffic. It is an important practice that helps maintain order on the roads and promotes safety for all road users. It's essential to be attentive, follow traffic signs and signals, and be aware of the right of way rules in your area to ensure a safe driving experience.
When you yield, you give the right of way to another driver or pedestrian. This means that you let them go first, even if it might inconvenience you or require you to slow down or stop.
Yielding is typically required in situations such as:
Yielding to pedestrians: When you approach a crosswalk or intersection where pedestrians are waiting to cross, you should yield to them and allow them to safely cross the road before you continue to drive. Drivers must yield to pedestrians within a crosswalk.
Yielding at intersections: When you approach an intersection where there are other vehicles, you should yield to those already in the intersection or approaching from the right. This helps prevent accidents and ensures a smooth flow of traffic.
Yielding when merging: When merging onto a highway or another lane, you should yield to the vehicles already in that lane. This allows for a safe and efficient merging process.
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exercise 1 : answer by true or false and correct the false one.
1: Vaccination is a therapy that is done by injecting virulent toxin.
answer?
2:Serothrapy is a method of immune preventive therapy.
answer?
3:HIV targets T8 cells.
answer?
4: During AIDS, T4 cells are very low+and no activation of B or T8 cells.
answer?
Answers
The given statement is true as hydrogen is the most abundant element that is present in living organisms.
It is more abundant than any other element in terms of the number of atoms, but when it comes to mass, oxygen is the most abundant element.What is the reason for the statement being true-Hydrogen atoms have a lower mass than oxygen atoms, and they make up more of water's mass than oxygen atoms. Additionally, hydrogen is present as single atoms and oxygen is bonded in compounds. Thus, the statement is accurate.Hydrogen is a gas, while oxygen is a solid. It is also found in compounds like water, where it is combined with oxygen to form H2O.
Since water is the most abundant compound in living organisms, it implies that hydrogen is also the most abundant element.Hydrogen's atomic mass is lower than that of oxygen. For example, hydrogen has an atomic mass of 1, while oxygen has an atomic mass of 16. Oxygen's larger atomic mass and tendency to bond with other elements, such as hydrogen, are the reasons why it is more abundant in terms of mass.Oxygen is present in water molecules, as well as in carbon dioxide (CO2) and other organic molecules like carbohydrates and proteins. These organic molecules contain a significant amount of carbon, hydrogen, and oxygen in their structure. Therefore, although hydrogen is the most abundant element in terms of the number of atoms, oxygen is more abundant in terms of mass.
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if the researchers were focused on an evolutionary perspective of human motivation, what aspect of the study results would be of most interest to them?
Answers
Hunger ratings for images of food. From an evolutionary standpoint, humans have developed a preference for high caloric foods because they are a good source of fuel in the form of fat.
Food is any substance that an organism consumes to sustain itself. The majority of food is made of essential components such carbohydrates, lipids, proteins, vitamins, and minerals and is derived from either plants, animals, or fungi. The substance is consumed by an organism and then absorbed by its cells to provide energy, support life, or stimulate growth. Different feeding habits exist among many animal species to satisfy the needs of their unique metabolisms. In certain geographic locales, these behaviors usually evolved to fill a specific ecological niche. Fat can sustain biological functions for a long time in the absence of meals (a common problem throughout evolution).
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porque se dice que los receptores son especificos y tienen adaptabilidad?
Answers
Answer:
Explanation:
Nhbhbhchiderecnfhife
I’ll give brainliest if you answer please helppp
Answers
Explain how a population of insects could become resistant to a pesticide.
Answers
Answer:
adaptation
Explanation:
A population of insects could adapt and evolve to be resistant to a pesticide.
Which option identifies why water in the following scenario is corrosive?
Ryan was running on the beach one day and decided to jump into the ocean. However, he forgot he had his phone in his pocket. His phone was damaged beyond repair by the ocean water.
the salt content
the bacteria content
the freshwater content
the groundwater content
Answers
Answer:
the salt content
Explanation:
the ocean water is very much corrosive because it content salt
anyone help me please I need help
Answers
Answer:
Dominant traits are always expressed when the connected allele is dominant, even if only one copy of the dominant trait exists. Recessive traits are expressed only if both the connected alleles are recessive. If one of the alleles is dominant, then the associated characteristic is less likely to manifest.
Explanation:
7. What is the mass and weight of a 10-kg object on earth?
Answers
Answer:
Weight= 98 newtons Mass=10kg
Explanation:
Answer:
Weight varies with location depending upon the acceleration due to gravity eg. for a mass m = 10kg on Earth it`s weight is W = mg = 10 x 10 = 100N.
Explanation:
stress-induced sympathetic stimulation of the adrenal medulla causes the secretion of catecholamines, which include:
Answers
The stress-induced sympathetic stimulation of the adrenal medulla causes the secretion of catecholamines which include Epinephrine and norepinephrine.
The adrenal medulla secretes catecholamines hormones that help the body respond to stress. Catecholamines include epinephrine and norepinephrine, also known as epinephrine and norepinephrine. Under stress, the adrenal glands respond quickly by increasing the secretion of glucocorticoids and catecholamines into circulation.
These hormones in turn affect metabolism supplying energy to the vascular system to raise blood pressure and prevent the immune system from becoming over-activated. Visceral stimulation is the physiological stimulation of catecholamine secretion. Her ACh is released from nerve endings in the adrenal medulla when splanchnic nerves are stimulated.
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Sympathetic stimulation by stress in the adrenal medulla causes the secretion of the catecholamines epinephrine and norepinephrine.
A type of neurohormone (a chemical substance made by nerve cells and used to send signals to other cells). Catecholamines are important in stress responses. High levels can cause high blood pressure, headaches, sweating, heart palpitations, chest pain, and anxiety. Epinephrine is also known as adrenaline.
A catecholamine test measures the amount of these hormones in the urine or blood. Higher than normal levels of dopamine, norepinephrine, and/or epinephrine can be signs of a serious health condition.
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1.
Choose which of Newton’s laws of motion is occurring in the boundary type’s situation.
Two plates that slide past each other build up stress that is released as an earthquake.
1st Law of Motion
2nd Law of Motion
3rd Law of Motion
Answers
Answer:
3rd Law of Motion
Explanation:
Answer: newton’s 1st law of motion
Explanation: Inertia states that an object that is at rest will stay at rest and an object that is in motion will stay in motion unless acted on by an unbalanced force.
50 POINTS!! ILL GIVE BRAINLIEST TO WHOEVER HELPS/ EXPLAINS THEIR ANSWER im not sure if this is correct, but i think the answer is nucleus. pls help :))
Answers
Answer:
youre right, it's nucleus !
Explanation:
it's the one thats helps prepare the process, and does a lot of work with all the nutrients and proteins!!
hopefully this helps, but i'm here if you need anymore assistance!!!
Which of these factors are required for biological evolution to occur? Select all that apply.A) genetic variation in the populationB) natural selectionC) variation in acquired traits among individuals in the populationD) a large populationE) many generations
Answers
A)Natural selection is indeed a significant force in biological evolution, although it is only one of many potential causes.
Particularly in smaller populations, certain genes or characteristics evolve through random processes like genetic drift. Recall that the alteration with in allele frequencies of the a population across generations is what is meant by biological evolution.
Variation, inheritance, and disparate reproductive success are three straightforward criteria that lead to evolution via natural selection. Natural selection doesn't really affect genotypes directly: It functions by taking advantage of phenotypic variations among population members. Evolution is governed by four principles: variation, inheritance, selection, and time. These are regarded as the elements of natural selection's evolutionary mechanism. Natural selection, genetic drift, gene flow, and mutation are the four driving forces behind evolution.
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